import java.io.*; class Fen{//分割文件 String fileName;//待分割的文件名 int size;//将大文件分成size大小的多个文件 Fen(String fileName,String size){ this.fileName = fileName; this.size = Integer.parseInt(size)*1024; } public void cut()throws Exception{ int maxx = 0; File inFile = new File(fileName); int fileLength = (int)inFile.length(); //取得文件的大小 int value; //取得要分割的个数 RandomAccessFile inn = new RandomAccessFile(inFile,"r");//打开要分割的文件 value = fileLength/size; int i=0; int j=0; //根据要分割的数目输出文件 for (;j< value;j++){ File outFile = new File(inFile.getName()+j+"zzii"); RandomAccessFile outt= new RandomAccessFile(outFile,"rw"); maxx+=size; for (;i< maxx;i++){ outt.write(inn.read()); } outt.close(); } File outFile = new File(inFile.getName()+j+"zzii"); RandomAccessFile outt= new RandomAccessFile(outFile,"rw"); for(;i< fileLength;i++){ outt.write(inn.read()); } outt.close(); inn.close(); } } class He{ //合并文件 String fileName;//将多个小文件合并成fileName String filterName;//小文件的扩展名 He(String fileName,String filterName){ this.fileName = fileName; this.filterName = filterName; } public void unite()throws Exception{ String [] tt; File inFile = new File("."); //在当前目录下的文件 File outFile = new File(fileName); //取得输出名 RandomAccessFile outt= new RandomAccessFile(outFile,"rw"); //取得符合条件的文件名 tt = inFile.list(new FilenameFilter(){ public boolean accept(File dir,String name){ String rr = new File(name).toString(); return rr.endsWith(filterName); } }); //打印出取得的文件名 for (int i = 0;i< tt.length;i++){ System.out.println(tt[i]); } //打开所有的文件再写入到一个文件里 for(int i=0;i< tt.length;i++){ inFile = new File(tt[i]); RandomAccessFile inn= new RandomAccessFile(inFile,"r"); int c; while((c=inn.read())!=-1) outt.write(c); } outt.close(); } } public class test{ public static void main(final String [] args)throws Exception{ if(args.length==0){ print(); return; } if(args[0].equals("-c")){ Fen cutt = new Fen(args[1],args[2]); cutt.cut(); } else if (args[0].equals("-r")){ He hee = new He(args[1],args[2]); hee.unite(); } else print(); } public static void print(){ System.out.println("usage:\n分: java test -c file1 size(单位为K)\n合 java test -r file2 zzii(我设置的方便标识)"); } } 运行结果: C:\java>java test usage: 分: java test -c file1 size(单位为K) 合 java test -r file2 zzii(我设置的方便标识) C:\java>java test -c ant.jar 100 C:\java>java test -r ant.jar zzii ant.jar0zzii ant.jar1zzii ant.jar2zzii ant.jar3zzii ant.jar4zzii ant.jar5zzii ant.jar6zzii ant.jar7zzii ant.jar8zzii ant.jar9zzii ant.jar10zzii
↑返回目录
前一篇: 用Look And Feel打造绚丽的界面外观!
后一篇: Java2,v5.0新特性实例